Challenge limit

Question

What is the maximum number of challenges per 24h period that a person can play another before exceeding the limit?

Answer 1

I think there is also a maximum number of unanswered outgoing challenges per hour of about 20 or 30.

Answer 2

It is 15 challenges against the same player. However, so far playing I haven't encountered the maximum number of challenges per 24h period that someone can play another before exceeding the limit. I guess the maximum is if someone has 15 challenges each against every single user account in SoloLearn.

Answer 3

I just tested that I can have more than 30 unanswered ongoing challenges in one hour. Maybe they have increased that limit.